In situ DRIFTS and CO-TPD studies of CeO2 and SiO2 supported CuOx catalysts for CO oxidation

Non-equilibrium plasma-assisted dry reforming of methane over shape-controlled CeO2 supported ruthenium catalysts

“…4, the H 2 -TPR signals show a few hydrogen consumption peaks corresponding to the reduction of surface oxygen (O s ) and bulk oxygen (O b ). 33 All of the oxidized and reduced CeO 2 samples display three main reduction peaks at less than 200 °C, 200–500 °C and greater than 500 °C. 43 In the region below 200 °C, 1 wt% Ru/CeO 2 NR-o presents two reduction peaks at 105 °C and 129 °C resulting from multiple oxidation states of RuO x due to the interaction between RuO x and CeO 2 .…”

“…CeO 2 nanorods (NR) and CeO 2 nanocubes (NC) were synthesized using a hydrothermal method, according to our previous research methodology. [32][33][34] For CeO 2 NR, rstly, 8 mL of 6.0 M NaOH (VWR, 99%) solution was added dropwise to 88 mL of 0.1 M Ce(NO 3 ) 3 $6H 2 O (Acros Organics, 99.5%) solution and appropriately mixed in a 200 mL Teon liner. The mixture was stirred for approximately 15 s, and the lid of the Teon liner was closed.…”

Low-Temperature Plasma-Assisted Catalytic Dry Reforming of Methane over CeO2 Nanorod-Supported NiO Catalysts in a Dielectric Barrier Discharge Reactor

“…The product was then washed with 50 mL of ethanol and finally dried in air at 60 °C for 12 h to avoid hard agglomeration of the CeO 2 nanoparticles. Then, the dried sample was collected and ground gently with a mortar and pestle. , …”

“…Then, the dried sample was collected and ground gently with a mortar and pestle. 10,16 2.1.3. Preparation of NiO/CeO 2 NR Catalysts.…”

“…In addition, the defects and oxygen vacancies present in CeO 2 enhance the adsorption and desorption behavior of the catalyst for CO 2 activation as well as facilitate the detachment of carbon from the catalyst surface . Shape-controlled and surface-engineered CeO 2 has found widespread applications in a variety of catalytic fields due to the fact that CeO 2 nanocrystals contain highly reactive surface oxygen vacancies and other defects that promote the reduction of adjacent Ce 4+ to Ce 3+ . In the literature, Ni/CeO 2 exhibited superior catalytic activity compared to Ni/α-Al 2 O 3 , Ni/TiO 2, Ni/ZrO 2 , Ni/SiO 2 , and Ni/MgO, which was attributed to higher Ni dispersion and a SMSI between NiO x and CeO 2 .…”